Diving With Multiple Gas Mixtures - Uwatec Galileo 2 TEK User Manual

3 .4 .2 Diving with multiple gas
mixtures
The G2TEK is equipped with the ZH-
L16C GF PMG algorithm. PMG stands
for Predictive Multi-gas, meaning that
when you program more than one gas
mixture, the G2TEK will predict the switch
to the higher oxygen concentration gas
at the depth that you specified and alert
you at all times with a comprehensive
decompression schedule of all the gas
mixtures that you programmed.
In other words, you get full credit at any
point during the dive for all the extra gas
mixtures that you are carrying with you. At
the same time, the G2TEK can also show
you what the decompression schedule
would be if you were to finish the dive using
only the gas mixture that you are currently
breathing from, so that you can be prepared
in the event that something doesn't work
as planned. See chapter: Activating PMG
to learn how to activate this mode on your
G2TEK.
! Diving with multiple gas mixtures represents
a much higher risk than diving with a single
gas mixture, and mistakes by the diver may
lead to serious injury or death.
! During dives with multiple gas mixtures,
always make sure you are breathing from the
tank that you intend to use. Breathing from a
high oxygen concentration mix at the wrong
depth can kill you.
! Mark all your regulators and tanks so
that you cannot confuse them under any
circumstances.
! Before each dive and after changing a tank,
ensure that each gas mixture is set to the
correct value for the corresponding tank.
! Get the proper training and certifications to
make multi-gas dives prior to making them by
yourself.
58
WARNING
VERY IMPORTANT!
The G2TEK enables you to use up to 8 gas
mixtures during the dive.
• For oxygen concentrations of 80% and
higher, the ppO max is fixed at 1.6bar
2
and cannot be changed.
• The MOD for tanks 2 through 8 are
the switch depths for those gases.
This is what the G2TEK uses for its
calculations, warnings and suggested
switch points.
• When diving with more than 1 gas
mixture, the nitrox reset time function
(described in the chapter: Nitrox reset
time) has the following effect: gas1 is
set to 21% gases 2 through 8 are set
to OFF.
F
NOTE: Start breathing from the tank
with the new gas mixture before
confirming a switch.
WARNING
Always make sure you are switching to the
intended gas. Failure to do so may result in
serious injury or death.
The following chapters about gas switching
are shown with 2 gas mixtures enabled.
However, more than two mixes enabled are
working similarly.
Time
Bottom mix
Diving with 2 gas mixtures
GALILEO 2 TEK (G2TEK) USER MANUAL
Deco mix